Clinton e



(No Model.)

o. E. WOODS. BRUSH HOLDER POR'DYNAMO ELECTRIC-MACHINES.

Patented-Aug. 25, 1896.

Fly. 5

W//VESSES:

UNiTnD STATES PATENT renin.

CLINTON E. IVOODS, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO THE AMERICAN ELECTRIC VEHICLE COM- PANY, OE SAME PLACE.

BRUSH-HOLDER FOR DYNAMOELECTRlC MACHINES.

SPECIFICATION forming part of Letters Patent No. 566,366, dated August25, 1896.

Applicatim led January l5, 1896. Serial No. 575,603. (No model.)

To aZZ whom t may concern:

Be it known that I, CLINTON E. Woons, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Brush-Holders forDynamo- Electric Machines, of which the following is a specification.

My invention relates to brush-holders for dynamo-electric machines, andhas for its object to provide a new and improved brushholder, of whichthe following is a description, reference being had to the accompanyingdrawings, wherein- Figure l is a front elevation of a brushholderembodying my invention. Fig. 2 is a side elevation of the same. Eig. 3is a crosssection on line 3 3, Fig. 1. Fig. i is a section on line 4 4,Fig. 1. Fig. 5 is a detail view, in part section, of one of thebrush-holding devices.

Like letters refer to like parts throughout the several figures.

I have shown in the drawings a brushholder adapted to be used upon afour-pole machine, the brushes being located around a common center.This brush-holder shows four sets of brushes, but it is of courseevident that the number of sets of brushes may be varied, if desired.The brushes are connected with a frame, which, as shown in the drawings,consists of a ring A. Two brushholding devices B and C are electricallyconnected with this ring and are preferably integral therewith, as shownin the drawings. These brush-holding devices may be constructed in anyconvenient manner. As shown in the drawings they consist of projectingarms provided with slots in which the brushes are inserted, the brushesin this case being cylindrical and being radially disposed about theeommutator. The two sets of brush-holding devices D and E are connectedwith the ring A, but are insulated therefrom, as shown. These twobrush-holding devices are electrically connected together by means ofthe strip E. As shown in the drawings, the said brush-holding devicesare integral with the strip E', the whole being insulated from the ringA.

Each brush-holdin g device, as shown in the drawings, is capable ofholding three brushes and is provided with the slots E E, the sides ofeach apartment into which the brush is held being provided with two ofsaid slots, one on each side thereof.

Associated with each brush-holding device are the movable parts orstrips G, adapted to fit into the slots F and bear upon the top of thebrush. These movable pieces or strips are connected together by anysuitable elastic devices, so that when the brushes are in position theyare elastically pressed against the commutator. As shown in thedrawings, these movable pieces are connected together by means of thesprings II H. The brushes are connected with the external circuit bymeans ofthe binding-posts I J. The binding-post I is electricallyconnected with the ring A, and the binding-post J is insulated from saidring but is electrically connected with the strip E.

I have described these several parts in detail, but it is evident thatthey maybe varied in form, construction, and arrangement withvoutdeparting from the spirit of Amy invention, and I therefore do not wishto be limited to the exact construction shown.

The use and operation of my invention are as follows: When the brushesare placed in the brush-holding devices and the movable pieces placed inposition in the slots E, the brushes will be elastically forced againstthe commutator, which is indicated in Eig. l in dotted lines. Thecurrent enters at one of the binding-posts, for example, the bindingpostI, and is conducted by means of the ring A to the brushes in the holdingdevices B and C. The current then passes through the armature of thedynamo and passes out of the machine through the brushes in the holdingdevices D and E and through the binding-post J. When it is desired toreplace any brush, the movable part G associated with said brush islifted out of the slots E and moved to one side, so that the brush maybe inserted in the opening in the holding device. The

movable part G is then replaced and the brushes will then be inoperative condition. It will be seen that I have here a simple,

IOO

convenient, and effective brnsh-holdcr by which the brushes areelastically pressed against the eoinmutator with substantially the samepressure at all times.

I claim- 1. A brush-holder for dynamo-electric inachincs comprising aframe having a series of brush-holding devices connected therewith, eachbrush-holding device provided with a movable part adapted to engage thebrush, an d a series of elastic connecting devices, connectin g saidmovable parts together whereby the brushes when in position areelastically 'forced against the coininutator.

2. A brush-holder for dynamo-electric inachines comprising a ring havinga series of brush-holding devices connected therewith, saidbrush-holding devices arranged around a common center, a movable partassociated with each brush-holding device and adapted to bear againstthe top of the brush when in position, and a series of springsconnecting said movable parts together whereby the brushes when inposition are elastically pressed against the commutator.

3. A brush-holder for dynamo-electric machines comprising a ring havinga series of brush-holding devices connected therewith, and slotted atone end, said brush-holding devices arranged around a common center, amovable part adapted to Work in slots in said brush-holding devices andadapted to bear against the top of the brush when in position and aseries of springs connecting said movable parts together, whereby thebrushes when in position are elastically pressed against the commutator.

4. A brusl1-holde1'for dynainoclectric machines comprising a ring,having two sets of brush-holding devices electrically connectedtherewith, two additional brush-holding dcvices attached to the ring,but electrically insulated therefrom, said latter brush-holding deviceselectrically connected together, a series of movable parts associatedwith said brush-holding devices and adapted to Work in slots cuttherein, and a series oi' springs connecting said movable partstogether, substantially as described.

CLINTON E. WOODS. \Vitncsses:

FRANcIs W. PARKER, DONALD M. CARTER.

